Ταξιθετικός Αριθμός
H - Social Science
83
Q - Science
70
T - Technology
58
L - Education
32
R - Medicine
27
Z - Library Science
14
G - Geography, Anthropology, Recreation
13
K - Law
11
P - Language and Literature
8
J - Political Science
3
B - Philosophy, Psychology, Religion
2
A - General Works
1
C - Historical Sciences
1
M - Music
1
N - Fine Arts
1